Octoprint - Raspberry Pi3 case with external Noctua fan

prusaprinters

<p>Let me start to thank user 0110-M-P from Thingiverse for sharing his work in Thingiverse:<br/> <a href="https://www.thingiverse.com/thing:922740">https://www.thingiverse.com/thing:922740</a></p> <p>I remixed his great job to obtain following results:</p> <ul> <li>active cooling with Noctua 40x10 5V fan</li> <li>less possible hardware needed to mount it</li> <li>shape to be hooked to Prusa MK3S 30x30 alluminum extrusions</li> <li>some mods to air passage</li> </ul> <p>Components needed:</p> <ul> <li><a href="https://www.raspberrypi.org/products/raspberry-pi-3-model-b-plus">RaspBerry Pi3 B+</a></li> <li><a href="https://noctua.at/en/products/fan/nf-a4x20-5v">Noctua 40x10 5Volts Fan</a></li> </ul> <p><b>Please double check you'll purchase 5Volts fan.</b></p> <p>Fan is fixed to case cover using its own soft silicone anti-vibration mounts (provided with the fan).</p> <p>Fan connects to Raspberry through GPIO port, using the connector you directly find in the fan box (pls look at enclosed picture to recognize it).<br/> <b>DOUBLE CHECK POLARITY</b>, because I had to swap the position of the 5V and GROUND cables on the fan connector (please check GPIO scheme in the pictures)</p> <p>Hardware needed :</p> <ul> <li>4 - M3x18 (or M3x20) screw</li> <li>4 - M3 hex nut</li> </ul> <p>I used screws and nuts directly from Prusa hardware spare bag, but they are really common stuff.</p> <p>Raspberry Pi3 B+ just fits into the 4 pins in the bottom case and is kept in place by the case cover itself.<br/> Cover is kept by 4 screws and nuts.</p> <p>In the end, the whole case is made to hook to the 30x30 alluminum extrusion on the right side of the printer.</p> <p>Happy printing !</p> <h3>Print instructions</h3><p>I achieved a perfect result using Prusament PETG with standard profile from PrusaSlicer.</p> <p>I used:</p> <ul> <li>0,2 mm base layer with variable height calculated with standard parameters from PrusaSlicer</li> <li>please use 5 to 8 walls to let pins being filled at 100%</li> <li>infill 20% with gyroid shape is enough</li> <li>supports are to be just from the bed</li> </ul> <p>I enclose and share both GCODE for direct printing and the two STL files of bottom and cover case.</p>